* Built in 4 different sizes to fit almost all inflatable boats on the market. Seat cushion is made from marine grade foam 8.5” wide & 1.4” thick and has a detachable under seat storage bag. * 2 Velcro pads for easy and quick installation of the cushion to the boat bench seat. Both sides of the cushion have a zipper to attach the under-seat storage bag. Storage bag has a shoulder strap for carrying on land. * 2 individual pockets on the front plus 1 cup holder pot. the under-seat bag is good for keeping your large items such as tackle box, umbrella and safety kit. * Air vents located on back of the bag. * Size list: Size XS : Suitable for kayak boat Dimensions: Cushion L24” x W8.5” x H1.4” / Bag: L16” x W8.5” x H10” Size S : Suitable for Boat Size 7.5-11ft Dimensions: Cushion L33.5” x W8.5” x H1.4” / Bag: L26” x W8.5” x H10” Size M : Suitable for Boat Size 12-13ft Dimensions: Cushion L39.5” x W8.5” x H1.4” / Bag: L31.5” x W8.5” x H11” Size L : Suitable for Boat Size 14-16ft Dimensions: Cushion L43.5” x W8.5” x H1.4” / Bag: L36” x W8.5” x H12”